2000-2001 Acura Integra 

1998-1999 Acura 2.3 CL 

1998-2002 Honda Accord 

1999-2000 Honda Civic 

 

ECU Pinout Diagram 

 

 

 

Connector A 

Pin # 

Name  

Function 

Signal Type 

 A19 

Engine Speed Pulse 

Engine speed pulse signal 

Speed 

 A23 

Secondary O2 Sensor 

Secondary oxygen sensor signal 

Analog 

 A32  

Brake Switch 

Brake switch signal  

Analog 

 
 
Connector B 

Pin # 

Name  

Function 

Signal Type 

 B1 

 Power Source 

 12V switched 

 Power 

 B2  

 Power Ground 

 Chassis ground 

 Ground 

 B9 

 Power Source 

 12V switched 

 Power 

 B10 

 Power Ground 

 Chassis ground 

 Ground 

 B12 

 VTEC Solenoid Valve 

 Drives VTEC solenoid valve 

 Analog  

 B21 

 Voltage Back Up 

 Permanent 12V 

 Power 

 
Connector C 

Pin # 

Name  

Function 

Signal Type 

 C3 

Knock Sensor 

Engine knock sensor 

Speed  

 C10 

VTEC Pressure Switch 

Detects VTEC pressure switch signal 

 Analog 

 C16 

Primary O2 Sensor 

Primary oxygen sensor signal 

Analog 

 C17 

MAP Sensor 

Manifold absolute pressure sensor signal  
0.32V @ -13.9 PSI 
4.84V @  10.94 PSI 

Analog 

 C23 

Vehicle Speed Sensor 

Vehicle speed sensor signal 

 Speed 

 C25 

Intake Air Temperature Sensor 

Air temperature sensor signal 

Analog 

 C26 

Engine Coolant Temperature 
Sensor 

Engine coolant temperature sensor signal 

Analog 

 C27 

Throttle Position Sensor 

Throttle position sensor signal 

Analog 

 
 

Caution! 

 

If you are not familiar with the vehicle’s electrical systems, onboard sensors, and vehicle dynamics, DO NOT attempt to perform ANY installation of PLX 
Devices Inc. product(s). PLX Devices Inc. does not guarantee 100% accuracy, compatibility and specific application functionality of these documents. Use these 

documents as guidelines ONLY and refer to your vehicle’s service manual for detailed information. 

 

Rev. 1 

3/18/2004